fix: second-wave bug fixes, security hardening, visual polish, UX improvements

Bug fixes:
- SRV-B1 through B5: server config, router, server_info, syscheck corrections
- BA-03 through BA-06: builder path and universal build cleanup (BLD-D1 through D3)
- Frontend WS race condition and useVisibleInterval hook fixed
- Drive-root path bug in PathForge resolved
- Upload error handling improved

Security:
- PathForge path traversal guard added
- Script injection escaping applied throughout

Visual (DV-01 through DV-15):
- Cyan design tokens and page headers standardised
- Dead CSS removed from Pages.css, PathTracerPage.css, wealth-deck.css
- SacredPageHeader deleted (replaced inline); sidebar version display fixed

UX:
- Emberwake request storm fixed (EmberwakePage.tsx)
- Help blurbs UH-01, UH-02, UH-06 added
- HelpTips wired into Crucible, Fleet (FleetGroupsStrip, FleetToolbar), Settings

Build:
- vite.config.ts: webroot auto-sync on build
- build_universal.go: universal build artifact cleanup
- PROBLEMS.md tracking updated

server/web/src/components/Fleet/FleetGroupsStrip.tsx

@@ -1,4 +1,5 @@
 import type { FleetGroup } from '../../help/fleetGroups';
+import { HelpTip } from '../HelpTip';
 import './FleetGroupsStrip.css';
 
 interface Props {
@@ -22,7 +23,7 @@ export default function FleetGroupsStrip({
 
   return (
     <div className="fleet-groups-strip card">
-      <span className="fleet-groups-strip-label font-tech">Groups</span>
+      <span className="fleet-groups-strip-label font-tech">Groups <HelpTip field="fl_groups" /></span>
       <div className="fleet-groups-strip-list">
         {groups.map((g) => {
           const onlineInGroup = liveAgentIds

server/web/src/components/Fleet/FleetToolbar.tsx

@@ -1,6 +1,7 @@
 import type { FleetFilterState } from '../../help/fleetFilters';
 import { collectFleetSubnets, collectFleetTags } from '../../help/fleetFilters';
 import type { Agent } from '../../types';
+import { HelpTip } from '../HelpTip';
 import './FleetToolbar.css';
 
 interface Props {
@@ -32,6 +33,7 @@ export default function FleetToolbar({
   return (
     <div className="fleet-toolbar card">
       <div className="fleet-toolbar-filters">
+        <HelpTip field="fl_filter_chips" />
         <input
           type="search"
           className="input fleet-filter-search"
@@ -95,6 +97,7 @@ export default function FleetToolbar({
       {selectedCount > 0 && (
         <div className="fleet-bulk-bar">
           <span className="font-tech">{selectedCount} selected</span>
+          <HelpTip field="fl_bulk_actions" />
           {onCreateGroup && (
             <button
               type="button"

server/web/src/components/Layout/Layout.tsx

@@ -336,7 +336,7 @@ export default function Layout({ children }: LayoutProps) {
           )}
           <div className="sidebar-sig font-tech">
             <span className="sig-love">made with <span className="sig-heart">♥</span> drjones</span>
-            <span className="sig-ver">v0.0.1</span>
+            <span className="sig-ver">{serverInfo?.version ?? 'v0.0.1'}</span>
           </div>
         </div>
       </nav>

server/web/src/components/Visual/sacredGeometry/SacredPageHeader.tsx

@@ -1,20 +0,0 @@
-import type { ReactNode } from 'react';
-import { SacredMotif } from './motifs';
-
-/** Optional sacred divider + motif beside page titles */
-export default function SacredPageHeader({
-  children,
-  className = '',
-}: {
-  children: ReactNode;
-  className?: string;
-}) {
-  return (
-    <header className={`page-header page-header--sacred ${className}`.trim()}>
-      {children}
-      <div className="page-header-sacred-motif" aria-hidden>
-        <SacredMotif name="hex" opacity={0.55} />
-      </div>
-    </header>
-  );
-}